Fair Value Measurement - Additional Information (Details) - USD ($) $ in Millions |
May 31, 2016 |
Aug. 31, 2015 |
|---|---|---|
| Senior Notes | 5.625% Senior Notes | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Fair value of long-term debt | $ 296.0 | $ 287.3 |